You have to drag the dress on her when getting ready for the date, also when you get ask by, " prince charming," if you do then say, "yes" otherwise it won't work!
On my own! I know that it doesn't work the way it should and I am sorry I tried I am still working on it and am going to try to fix it! In the meantime you could try to be remixing and figuring out what mistakes i've made!